So did you accomplish that task?
Do your heads have the "hole" on the back cylinder so you can move the ET sensor from the front cylinder to the back cylinder? If so, log your data from the front cylinder on a long varied putt which includes your goal MPH and road grade/load. Then move it to the back cylinder and run the same route in the same time frame and load with the same ambient temps, with the same wind speed and direction and look at the logged data.
About the only electronic adjustments are ignition timing and AFR which ought to be easy enough to manipulate to achieve your goal assuming your goal is worthwhile.
SnS heads have a "hole" in each head .......... .
I assume you are using an infrared gun for your temp checks unless you moved the ET sensor to the back cylinder.